Method for coating a conductive film web with a conductive adhesive

Abstract

The present invention relates to a method for coating a conductive film web (210) with a conductive adhesive (1), characterized in that the method comprises providing a conductive film web (210) and coating the film web (210) with a conductive adhesive (1).

Description

Technical Field

[0001] The present invention relates to a method for coating a conductive film web with a conductive adhesive.

[0002] For example, during the manufacture of wallpaper for structural parts, in order to apply decorative structural elements to a web-shaped printed material, an expandable material, for example based on polyurethane, is passed through a screening roller and applied to the printed material using a doctor blade. Such methods are known, for example, from JP05262509B2 and EP2322711B1. Known methods have the disadvantage that even if the coated web is only wound up for transport, the applied material needs to be dried and / or cured first after application before further processing is possible.

[0003] In the manufacture of electrodes for electrical energy storage devices, a film web coated with a conductive adhesive to provide a current collector is bonded to a dry electrode film pre-calendered in a multi-roller calender. For this purpose, the dry electrode film and the film web, together with their adhesives, are introduced into a roller gap facing the dry electrode film, whereby the dry electrode film is electrically connected to the film web via the adhesive and further compressed. Such a calendering process is described in WO2020 / 150254A1.

[0004] The object of the present invention is to further develop the method first mentioned, in particular in the calendering process for dry electrode manufacture, so as to enable further processing of a film web coated with a conductive adhesive immediately after coating.

[0005] This object is achieved by a method having the features of claim 1. Advantageous embodiments are the subject matter of the respective dependent claims.

[0006] The present invention relates to a method for coating a conductive film web with a conductive adhesive, characterized in that the method comprises providing a conductive film web and coating the film web with a conductive adhesive.

[0007] The method according to the present invention enables, in particular for the calendering process in the production of dry electrode films, the coating of the conductive film web with the adhesive to be carried out in situ. For example, in a modified form of the prior art, the conductive film web coated with the adhesive is first coated immediately before being introduced into the roller gap, instead of the film web being introduced from the unwind spool into the roller gap of the calender, and can be introduced into the roller gap as the coated film web. When the adhesive on the coated film web is introduced into the roller gap, it may still not be fully cured or dried, and the adhesion of the dry electrode film to the film web can be further enhanced. In particular, the calendering process can include a further drying or curing step of curing, drying, or crosslinking the adhesive to its final strength. For this purpose, the multi-roller calender used in the calendering process can have at least one heated roller. Preferably, the heated roller is one of the rollers forming the roller gap into which the film web coated with the adhesive is introduced after coating, for connection to the dry electrode film.

[0008] The adhesive can be provided as a liquid adhesive containing a solvent that is volatile under standard conditions. The standard conditions can mean ambient pressure and / or ambient temperature. The standard conditions can mean room pressure and / or room temperature, for example, a pressure of about 1 bar and / or a temperature of about 20 °C.

[0009] The method can include drying and / or curing the conductive adhesive after coating the film web with the conductive adhesive.

[0010] Coating of the conductive film web can be carried out using a gravure printing process and / or a flexographic printing process.

[0011] During coating, the conductive film web to be coated can pass, or will pass, through the roller gap between the printing plate cylinder and the counter pressure cylinder. The printing plate cylinder and / or the counter pressure cylinder can be set up to apply an adhesive to the film web.

[0012] The conductive adhesive coated on the conductive film web can be cured after coating. It can be conditional on the fact that the conductive adhesive coated on the conductive film web can dry and / or be conditioned and / or crosslinked after coating.

[0013] The film web coated with the conductive adhesive can be wound up, or directly supplied to a calendering unit for the production of dry electrodes, if necessary after the curing step. The calendering unit can be, or can include, a multi-roller calendering unit and / or a multi-roller calendar. The calendering unit can be set up and / or used, for example, for the production of dry electrodes (such as lithium ion electrodes).

[0014] The method can include conditioning of the conductive adhesive before applying the adhesive on the conductive film web. The method can include a certain conditioning or the aforementioned conditioning of the conductive adhesive before applying the adhesive on the conductive film web.

[0015] The conductive adhesive can be introduced into a number of cells of the printing plate cylinder for coating. At least one, several, or all of the cells can be engraved or can include engraving. At least one, several, or all of the cells and / or the engraving can extend within the printing plate cylinder and / or can be or include recesses. The cells and / or the engraving can have or include grooves.

[0016] The coated conductive film web can be supplied to the second roller gap of a multi-roller calender, and the second roller gap can accommodate the film web. The second roller gap can laminate the coated conductive film web to a first dry electrode film and a second dry electrode film to form a double-sided dry electrode. The second roller gap can laminate the first dry electrode film and the second dry electrode film onto the film web, particularly the coated conductive film web, to form a double-sided dry electrode. The first dry electrode film and / or the second dry electrode film can be laminated to or applied to the coated conductive film web, or can be laminated or applied, and they can be or can be connected to the coated conductive film web.

[0017] The method can a. involve providing a first dry electrode material to a first supply system for the dry electrode material; b. forming a first roller gap between a first calender roller and a second calender roller; c. calendering a first dry electrode film made from the first dry electrode material within the first roller gap; and can include the steps of.

[0018] The method can include forming a second roller gap between a third calendar roller and a further calendar roller, and the first dry electrode film can be transferred to the second roller gap after leaving the first roller gap. The further calendar roller can be arranged upstream of the third calendar roller. It can be conditional on the further calendar roller being able to be the second calendar roller or corresponding thereto. "Upstream side" can mean that the first dry electrode film is first guided to, into, or through the first roller gap before being guided to, into, or through the second roller gap, or before it would be so guided.

[0019] It can be conditional on the calendaring of the first dry electrode film made from the first dry electrode material being carried out in the first roller gap by the rotational speed of a second calendar roller that can exceed the rotational speed of the first calendar roller.

[0020] The third calendar roller can operate at a rotational speed that can exceed the rotational speed of the further calendar roller. The third calendar roller can operate at a rotational speed that can exceed the rotational speed of the second calendar roller.

[0021] The method a. forming a third roller gap between a fourth calendar roller and other calendar rollers, b. receiving a second dry electrode material from a second supply system for the dry electrode material in the third roller gap, c. forming a second dry electrode film in the third roller gap, and can include steps such as these.

[0022] The other calendar roller can be, or can correspond to, the third calendar roller. The other calendar roller and / or the third calendar roller can be arranged adjacent to and / or downstream of the fourth calendar roller. "Upstream side" can mean that the second dry electrode film is first guided into, within, or through the third roller gap before it is guided into, within, or through the second roller gap, or before it is to be guided into, within, or through the second roller gap.

[0023] The second dry electrode film can be calendared or will be calendared within the third roller gap. Subject to the rotation speed of the third calendar roller and / or other calendar rollers being able to exceed the rotation speed of the fourth calendar roller, the second dry electrode film can be formed and / or calendared within the third roller gap.

[0024] The method can include introducing a coated conductive film web into the second roller gap, and the coated conductive film web can be laminated by the first dry electrode film and the second dry electrode film so that double-sided dry electrodes can be obtained.

[0025] The coated conductive film web can be introduced into the second roller gap immediately after coating, and the film web can be introduced into the second roller gap either after complete drying and / or curing or at least before complete drying and / or curing.

[0026] Coating of the film web can be performed in situ by feeding the conductive film web into the second roller gap of a multi-roller calendar.

[0027] After the applied conductive film web is introduced into the second roller gap, it can be cured, dried, and / or crosslinked within a multi-roller calendar.

[0028] The film web can be heated for curing, drying, or crosslinking. In some embodiments, the film web and / or the adhesive can be heated for curing, drying, or crosslinking by heating the applied film web together with the first and / or second dry electrode films via the heating rolls of the multi-roller calendar. The multi-roller calendar can have at least one heating roll. One, some, or all of the calendar rolls, for example, the first calendar roll, the second calendar roll, the third calendar roll, the fourth calendar roll, additional calendar rolls, and / or other calendar rolls can be heated or can be capable of being heated, provided that this is the case.

[0029] Further details of the present invention are described using the following figures.

Brief Description of the Drawings

[0030]

Figure 1

Figure 2

Figure 3

Modes for Carrying Out the Invention

[0031] FIG. 1 shows a multi-roller calender 100 capable of manufacturing two dry electrode films and laminating them on a current collector 10 to form a double-sided electrode. The multi-roller calender 100 can have more than one roller, for example, four rollers 4, 5, 6, 7. The current collector 10 can be or include a film web 10 coated with an adhesive 1. The film web 10 coated with the adhesive 1 can also be referred to as the current collector 10. The film web 10 coated with the adhesive 1 can be, for example, a film web 10 coated with the adhesive 1 or can include it.

[0032] In FIG. 1, two supply systems 2 and 3 for the dry electrode material, as well as four rollers 4, 5, 6, and 7 can be seen. The primer-coated current collector 10 can be provided from the supply spool 8. The first dry electrode film 20 can be formed by passing particles, such as particulate dry electrode material 22, from the supply system 2 through the first gap 13 between the rollers 4 and 5 and calendaring. The second dry electrode film 21 can be formed by passing particles, such as particulate dry electrode material 22, from the supply system 3 through the third gap 14 formed between the rollers 6 and 7 and calendaring. Both the dry electrode films 20 and 21 can be laminated to the opposing first or second side portions of the primer-coated film web 10 and / or to the opposing first or second side portions of the current collector 10. The lamination can be carried out by compressing, in particular calendaring, the dry electrode films 20 and 21, the primer-coated film web 10, and / or the current collector 10 between the second gap 11 formed between the rollers 5 and 6. In addition to the lamination, this second gap 11 also allows for additional calendaring to determine the film thickness of the dry electrode films 20 and 21. After lamination between the rollers 5 and 6, the double-sided electrode 110 is collected for further processing, for example via the take-up spool 9. The electrode 110 can be or include a dry electrode. The dry electrode 110 can be or include a lithium-ion electrode and / or can be formed by the manufacture of a lithium-ion electrode or can be used during or for the manufacture thereof. The electrode 110 and / or the dry electrode 110 can be or include a double-sided electrode and / or a double-sided dry electrode.

[0033] When applying and / or laminating the first dry electrode film 20 to the film web 10, the first dry electrode film 20 can be adhered to the film web 10 and / or adhered onto the film web 10, for example, via the adhesive 1 applied to the film web 10 or thereby. When applying and / or laminating the second dry electrode film 21 to the film web 10, the second dry electrode film 21 can be adhered to the film web 10 and / or adhered onto the film web 10, for example, via the adhesive 1 applied to the film web 10 or thereby.

[0034] The first dry electrode film 20 can be calendered or will be calendered, for example, by the roller pair 4, 5 and / or the first roller 4 and the second roller 5. The multi-roller calender 100 can include the roller pair 4, 5 or the first roller 4 and the second roller 5. The roller 4 and / or the roller 5 can be or can include a calender roller. In some embodiments, it can be conditioned that one of the rollers 4, 5 of the roller pair has a higher rotational speed than the other of the rollers of the roller pair. For example, the rotational speed of the second roller 5 can exceed the rotational speed of the first roller 4, and / or the second roller 5 can rotate at a higher speed than the first roller 4. However, in some embodiments, it can also be conditioned that the first roller 4 can exceed the rotational speed of the second roller 5, and / or the first roller 4 can rotate at a higher speed than the second roller 5. However, in some embodiments, the two rollers 4, 5 can also have the same rotational speed and / or can rotate at the same speed.

[0035] The first dry electrode film 20 can be manufactured within the first gap 13, which can be formed by the roller pair 4, 5 and / or the rollers 4 and 5. For example, the dry electrode material 22 can be introduced into the first gap 13 for this purpose. In the first gap 13, the dry electrode material 22 can be calendered, pressed, and / or compressed to form the first dry electrode film 20.

[0036] The second dry electrode film 21 can be, or will be, calendered, for example, by the roller pair 6, 7 and / or the third roller 6 and the fourth roller 7. The multi-roller calender 100 can have the roller pair 6, 7 or the third roller 6 and the fourth roller 7. The roller 6 and / or the roller 7 can be, or can include, a calender roller. In some embodiments, it can be conditional that one of the rollers 6, 7 of the roller pair has a higher rotational speed than the other roller of the roller pair. For example, the rotational speed of the fourth roller 7 can exceed the rotational speed of the third roller 6, and / or the fourth roller 7 can rotate at a higher speed than the third roller 6. However, in some embodiments, it can also be conditional that the rotational speed of the third roller 6 can exceed the rotational speed of the fourth roller 7, and / or the third roller 6 can rotate at a higher speed than the fourth roller 7. However, in some embodiments, the two rollers 6, 7 can also have the same rotational speed, and / or can rotate at the same speed.

[0037] Alternatively or in addition, it can be conditional that the second roller 5 and the third roller 6 have different rotational speeds and / or can rotate at different rotational speeds. It can be conditional that the rotational speed of the second roller 5 can exceed that of the third roller 6 and / or the second roller 5 can rotate at a rotational speed that can exceed the rotational speed of the third roller 6. It can be conditional that the rotational speed of the third roller 6 can exceed that of the second roller 5 and / or the third roller 6 can rotate at a rotational speed that can exceed the rotational speed of the second roller 5. However, in some embodiments, the second roller 5 and the third roller 6 have the same rotational speed and / or can rotate at the same rotational speed.

[0038] It can be conditional that the rotational speed of one, several, or all of the rollers, particularly the first roller 4, the second roller 5, the third roller 6, and / or the fourth roller 7, can be individually selected, controlled, and / or adjusted. The rotational speed of one, several, or all of the rollers, particularly the first roller 4, the second roller 5, the third roller 6, and / or the fourth roller 7, can be selected and / or adjusted according to the type, material, and / or composition of the dry electrode material 22, the first dry electrode film 21, the second dry electrode film 22, the adhesive 1, and / or the film web 210 and / or the film web 10.

[0039] The second dry electrode film 21 can be within or can be produced in the third gap 14 by or by means of the roller pair 4, 5 and / or the rollers 4 and 5. For example, the dry electrode material 22 can be introduced into the first gap 13. In the third gap 14, the dry electrode material 22 can be calendered, pressed, and / or compressed to form the first dry electrode film 20.

[0040] The second roller 5 and the third roller 6 can be made conditional on forming the roller pair 5, 6. The multi-roller calendar 100 can include the roller pair 5, 6 or the second roller 5 and the third roller 6. The roller 6 and / or the roller 7 can be or can include a calendar roller. The roller pair 5, 6 can function to laminate the first dry electrode film 20 and / or the second dry electrode film 21 onto the film web 10. The second gap 11 can be formed between the rollers 5, 6. The rollers 5, 6 and / or the roller pair 5, 6 can form the second gap 11. The film web 10 can be introduced into and / or pass through the second gap 11.

[0041] The first dry electrode film 20 can be introduced into and / or pass through the second gap 11 between the rollers 5, 6 and / or the gap 11 of the roller pair 5, 6. The second dry electrode film 21 can be introduced into and / or pass through the second gap 11 between the rollers 5, 6 and / or the gap 11 of the roller pair 5, 6. The film web 10, the first dry electrode film 20 and / or the second dry electrode film 21 can be guided within the second gap 11 so that the first dry electrode film 20 can be applied and / or laminated on one side of the film web 10, and the second dry electrode film 21 can be applied and / or laminated on the opposite side of the film web 10.

[0042] In some embodiments, the roller pairs 4, 5 can be arranged opposite the roller pairs 6, 7. In some embodiments, the roller pairs 4, 5 can be arranged on one side of the film web 10, and the roller pairs 6, 7 can be arranged on another side and / or the opposite side of the film web 10. The first roller 4 can be arranged substantially adjacent to the second roller 5, and / or vice versa. The third roller 6 can be arranged substantially adjacent to the fourth roller 7, and / or vice versa. The second roller 5 can be arranged substantially adjacent to the third roller 6, and / or vice versa.

[0043] It can be conditional that the second roller 5 is not only part of the roller pair 4, 5 capable of forming the first dry electrode film 20, but also part of the roller pair 5, 6 capable of applying and / or laminating the first dry electrode film 20 onto the film web 10. It can be conditional that the third roller 6 is not only part of the roller pair 6, 7 capable of forming the second dry electrode film 21, but also part of the roller pair 5, 6 capable of applying and / or laminating the second dry electrode film 21 onto the film web 10.

[0044] In some embodiments, the second roller 5 can be arranged upstream of the third roller 6. "Upstream side" can mean the direction opposite to the transport or conveyance direction of the first dry film 20. The first dry film 20 can be guided first through the first gap 13 and then through the second gap 11, and / or can at least contact the roller 5 first at the first gap 13, within, or near it, and then at the second gap 11, within, or near it.

[0045] In some embodiments, the third roller 6 can be disposed downstream of the fourth roller 7. "Downstream" can mean the direction within the transport or conveyance direction of the second dry film 21. The second dry film 21 can be guided first through the third gap 13 and then through the second gap 11, and / or can at least contact the roller 6 first at the third gap 14, within or near it, and then at the second gap 11, within or near it.

[0046] The multi-roller calender 100 according to the present invention shown in FIG. 2 and / or described below can have one, several, or all of the features and / or advantages of the multi-roller calender 100 shown in FIGS. 1 and / or 3 and described above and / or below.

[0047] The coating of the film web 210 with the adhesive 1 and / or the application of the adhesive 1 to the film web 210 can be carried out and / or be done using a flexographic printing process. Using the flexographic printing process, the adhesive 1 can be applied and / or coated onto the film web 210 on which the adhesive has not yet been applied in order to obtain the film web 10 on which the adhesive 1 has been coated and / or applied.

[0048] Due to the described arrangement of the rollers, for example, the first roller 4, the second roller 5, the third roller 6, and / or the fourth roller 7, the roller calender 100 can be designed to save space and / or require a small installation area.

[0049] In one embodiment of the present invention, in contrast to the multi-roller calendar 100 shown in FIG. 1, the multi-roller calendar 100 shown as an example in FIG. 2 has a flexographic printing unit 200 instead of the film web 10 coated with an adhesive or the supply spool 8 of the current collector 10. Using this flexographic printing unit, an uncoated conductive film 210, such as an aluminum film, is coated on both sides with an adhesive 1 in order to form the film web 10 coated with the adhesive 1 and / or the current collector 10. The liquid adhesive 1 is supplied to the chamber doctor blade 202 via the supply line 201. The liquid adhesive 1 is applied to the structured anilox roller 203 via the chamber doctor blade 202 and transferred from the anilox roller 203 to the printing plate cylinder 204. The film web 210 without the adhesive is pulled away from the supply spool 205 and introduced around the roller gap 12 between the printing plate cylinder 204 and the second printing plate cylinder 204. When the adhesive 1 is transferred from the printing plate cylinder 204 to the film web 210, the coated film web 210 is used as the current collector 10 and / or as the film web 10 coated with the adhesive 1 in the manner described with reference to FIG. 1 to be connected to both sides of the calendared dry electrode films 20, 21 and supplied to the second gap 11 of the multi-roller calendar 100.

[0050] Furthermore, when deviating from the prior art, the adhesive 1 can still be not (fully) cured, not dried, and / or not cross-linked when the current collector 10 is introduced into the multi-roller calender 100 and / or the second gap 11, so that it can be liquid or viscous, or have reduced strength. Thus, further drying, curing, and / or cross-linking of the adhesive 1 occurs either when the film web 210 coated with the adhesive 1 is bonded to the dry electrode films 20, 21, or during a subsequent calendaring step in which the dry electrode films 20, 21 arranged on opposite sides are further compressed to the final thickness or final density, or when the current collector 10 coated with the dry electrode films 20, 21 is transported within the multi-roller unit 100, and the coated current collector 10 leans against the jacket of the heating roller.

[0051] The coating of the film web 210 with the adhesive 1, and / or the application of the adhesive 1 to the film web 210, can be carried out and / or performed using a flexographic printing process. Using the flexographic printing process, the adhesive 1 can be applied and / or coated onto the film web 210 that has not yet been provided with the adhesive in order to obtain a film web 10 coated with and / or provided with the adhesive 1.

[0052] The multi-roller calender 100 according to the invention shown in FIG. 3 and / or described below can have one, several, or all of the features and / or advantages of the multi-roller calender 100 shown in FIGS. 1 and / or 2 and described above and / or below.

[0053] In one embodiment of the present invention, in a modified form of the embodiment shown in FIG. 2, as shown by way of example in FIG. 3, the gravure printing unit 300 is used to coat the film web 210 with the adhesive 1. The adhesive 1 is held in the tray 350, and within the tray, the horizontal plate cylinder 320 protrudes upward from its lower side. The plate cylinder 320 has a cell engraving 330 for receiving the adhesive 1. The cell engraving 330 can also be referred to as a cell 330. The cell 330 can have an engraving that can extend within the plate cylinder 320. The cell(s) 330, or the engraving, can have a pattern that enables and / or facilitates the removal and / or capture of the adhesive 1 from the tray 330. One or more cells 330, or the engraving, can include grooves and / or recesses.

[0054] On the side of the cylinder jacket facing in the direction opposite to the rotation direction of the tray 350, a doctor blade 340 is arranged, so that only the adhesive 1 remains within the cell 330 in order to remove the excess adhesive 1. The roller gap 12 is formed above the plate cylinder 320 facing in the direction opposite to the doctor blade 340 within the rotation direction of the plate cylinder 320 with respect to the second plate cylinder 320. The first plate cylinder 320 and / or the second plate cylinder 320 can be or include a printing plate cylinder and / or a counter pressure cylinder. The first plate cylinder 320 can be or include a printing plate cylinder, and the second plate cylinder 320 can be or include a counter pressure cylinder. The first plate cylinder 320 can be or include a counter pressure cylinder, and the second plate cylinder 320 can be or include a printing plate cylinder.

[0055] The film web 210 to be coated passes through the roller gap 12. The contact pressure between the plate cylinder 320 and the second plate cylinder 320 is high enough for the film web 210 to be coated to contact the adhesive 1 within the cell 330 of the roller gap 12 and for the adhesive 1 to transfer from the plate cylinder 320 to the film web 210.

[0056] The film webs 10, 210 can be conductive. The film web 210 not yet coated by the adhesive 1, and / or the film web 10 coated by the adhesive 1 can function as a current collector, and / or an electrode 110 or a current collector of the aforementioned electrode 110.

[0057] In some embodiments, the adhesive 1 can be applied to the film web 210 in spots or sections. When applying and / or laminating the dry films 20, 21, and / or adhering the dry films 20, 21, it can be conditional that the adhesive applied in spots or sections is distributed, or can be distributed, along the film web 10.

[0058] In some embodiments, the adhesive 1 can be applied continuously to the film web 210 and / or to a web or strip extending at least along the transport direction of the film web 210.

[0059] The adhesive 1 can be conductive. The adhesive 1 can be produced by a solvent that is liquid and volatile under standard conditions. The standard conditions can be, for example, room temperature (e.g., 20 °C) and / or a pressure of about 1 bar.

[0060] It can be conditional that the adhesive 1, particularly the conductive adhesive 1, can be conditioned before coating. The adhesive 1, particularly the conductive adhesive 1, can be conditioned before coating, application, and / or lamination of the film web 10. In some embodiments, the adhesive 1 can be conditioned, and / or warmed, or heated to a temperature such that it can have a viscosity that can be easily applied to the film web 10 and / or can be transported along by rollers or cylinders 204, 320 and / or cells 330. Depending on the type and / or composition of the adhesive 1, the adhesive 1 can be conditioned at different temperatures or will be conditioned. The conditioning and / or temperature can be selected and / or carried out depending on the type, material, and / or composition of the adhesive 1. A corresponding device, for example, a conditioning and / or heating device capable of conditioning the adhesive 1, can be provided for conditioning.

[0061] In some embodiments, it can be conditional that the film web 10 coated with the conductive adhesive 1 can be wound onto, or by, for example, a take-up spool 9 (not shown). By supplying the film web 10 coated with the conductive adhesive 1 and wound onto the take-up spool 9 to a multi-calender 100, for example, as described with reference to FIG. 1, it can be conditional that the electrode 110, particularly the dry electrode 110, can be manufactured. It can be conditional that the take-up spool 9 can function as a supply spool 8 or can correspond to a supply spool 8 on which the film web 10 coated with the adhesive 1 can be provided.

[0062] It can be conditional that the conductive adhesive 1 coated on the conductive film web 10 dries, and / or is conditioned, and / or can be cross-linked after coating. For this purpose, a corresponding device, such as a heating device, etc., can be provided. In some embodiments, the coated and cured film web 10 can be wound, for example, onto a take-up spool 9 (not shown), or by it.

[0063] Alternatively or additionally, the coated film web 10 can be supplied to a multi-roller calender 100. In some embodiments, the film web 10 or the adhesive 1 can be cured. In some embodiments, the film web 10 or the adhesive 1 can be at least partially cured. In some embodiments, the adhesive 1 applied to the film web 10 can be at least partially, or completely, liquid.

[0064] In some embodiments, it can be conditional that the cured adhesive 1 can be at least partially liquefied, and / or the curing can be at least partially reversed, before laminating the first dry electrode film 20 and / or the second dry electrode film 21 to the film web 10. However, in some other embodiments, it can also be conditional that the first dry electrode film 20 and / or the second dry electrode film 21 can be laminated onto, or to, the cured adhesive 1 or the film web 10.

[0065] Alternatively or additionally, it can be conditional that the film web 10 covered and / or coated with the adhesive 1 is introduced, and / or supplied, into the second gap 11 and / or the multi-roller calender 100 immediately after coating. The film web 10 covered and / or coated with the adhesive 1 can be laminated to, and / or bonded to, the first dry electrode film 20 and / or the second dry electrode film 21 immediately after coating.

[0066] Coating of the film web 210 can be carried out in situ by feeding the conductive film web 10 to the multi-roller calendar 100 and / or the second gap 11, or into them. In some embodiments, the film web 210 not yet coated by the adhesive 1 can be introduced into the multi-roller calendar 100 and / or the second gap 11, and the adhesive 1 can be applied substantially into or within the gap 11 and / or coated. It can be conditional upon the fact that the adhesive 1 can be applied and / or coated onto the film web immediately before and / or just slightly before the lamination of the first dry electrode film 21 and / or the second dry electrode film 21.

[0067] Alternatively or additionally, in some embodiments, the adhesive 1 and / or the film web 10 can be cured, dried, and / or cross-linked only after being introduced into the multi-roller calendar 100 and / or the second gap 11. It can be conditional upon the fact that the adhesive 1 and / or the film web 10 can be cured, dried, and / or cross-linked only after the application of the first dry electrode film 20 and / or the second dry electrode film 21 onto the film web 10 and / or at least after the first dry electrode film 20 and / or the second dry electrode film 21 have come into contact with the film web 10. For this purpose, suitable devices, such as heating devices, etc., can be provided.

[0068] The film web 10 and / or the adhesive 1 can be heated to cure, dry, or crosslink. For example, the film web 10 coated by the first dry electrode film 20 and / or the second dry electrode film 21 can be heated by the heating rollers of the multi-roller calender 100. The heating rollers can be, for example, calender rollers (such as the second roller 5 and / or the third roller 6). In some embodiments, the multi-roller calender 100 can alternatively or additionally include one or more further heating rolls (not shown). In some embodiments, the further heating roller, or optionally at least one, several, or all of the further heating rollers, can be arranged behind the second and third rollers 5, 6 and / or within the transport or conveyance direction of the film web 10 behind the roller pair 5, 6.

[0069] In the multi-roller calender 100 and / or thereby, the electrode 110, preferably the dry electrode 110, can be formed and / or manufactured, for example, as described above, by applying the dry electrode material 22 and / or the dry electrode films 20, 21.

[0070] The features of the present invention disclosed in the above description, figures, and claims can be essential for the implementation of the present invention, either individually or in any combination.

Explanation of Reference Numerals

[0071] 1 Adhesive 2 Supply System 3 Supply System 4 Roller 5 Roller 6 Roller 7 Roller 8 Supply Spool 9 Take-up Spool 10 Current Collector 11 Second Roller Gap 12 Roller Gap 13 First Roller Gap 14 Third roller gap 20 Dry electrode film 21 Dry electrode film 22 Dry electrode material 100 Multi-roller calendar 110 Electrode 200 Flexographic printing unit 201 Supply line 202 Chamber doctor blade 203 Anilox roller 204 Printing plate cylinder 205 Supply spool 210 Film web 300 Gravure printing unit 300 Plate cylinder 330 Cell 340 Doctor blade 350 Tray

Claims

1. A method for coating a conductive film web with a conductive adhesive, comprising providing the conductive film web and coating the film web with the conductive adhesive.

2. The method according to claim 1, wherein the adhesive is provided as a liquid adhesive containing a solvent that is volatile under standard conditions.

3. The method according to claim 1, comprising coating the film web with the conductive adhesive, and then drying and / or curing the conductive adhesive.

4. The method according to claim 1, wherein the coating of the conductive film web is carried out using a gravure printing process and / or a flexography printing process.

5. The method according to claim 4, wherein the conductive film web to be coated passes through a roller gap between a printing plate cylinder and an opposing impression cylinder during coating.

6. The method according to claim 1, wherein the conductive adhesive coated on the conductive film web is cured, preferably dried and / or tempered and / or crosslinked after coating.

7. The method according to claim 1, wherein, optionally after the curing step, the conductive film web coated with the conductive adhesive is either wound up or directly supplied to a calendering unit (preferably a multi-roller calender) for the manufacture of a dry electrode (preferably a lithium-ion electrode).

8. The method according to claim 1, preferably comprising tempering the conductive adhesive before coating the conductive film web with it.

9. The method according to claim 1, wherein the conductive adhesive for coating is introduced into a plurality of cells of a printing plate cylinder.

10. The method according to claim 1, wherein the coated conductive film web is supplied to a second roller gap of a multi-roller calendar, the second roller gap receives the film web, and laminates it with a first dry electrode film and a second dry electrode film to form a double-sided dry electrode.

11. a. A step of supplying the first dry electrode material using a first supply system for dry electrode materials, b. The step of forming a first roller gap between the first calendar roller and the second calendar roller, c. Calendering a first dry electrode film made of the first dry electrode material within the first roller gap, preferably at a rotation speed of the second calender roller that exceeds the rotation speed of the first calender roller. The method according to claim 10, including the method described in claim 10.

12. The method according to claim 11, comprising forming a second roller gap between a third calender roller and another calender roller preferably positioned upstream of the third calender roller, wherein the first dry electrode film is transferred to the second roller gap after leaving the first roller gap, the other calender roller preferably being the second calender roller.

13. The method according to claim 12, wherein the third calendar roller operates at a rotational speed exceeding the rotational speed of the other calendar roller.

14. a. A step of forming a third roller gap between a fourth calendar roller and another calendar roller, preferably located adjacent to and / or downstream of the fourth calendar roller, wherein the other calendar roller is preferably the third calendar roller, b. The step of receiving the second dry electrode material from the supply system for the second dry electrode material into the third roller gap, c. The step of forming a second dry electrode film in the third roller gap, The method according to claim 10, including the method described in claim 10.

15. The method according to claim 10, comprising the step of introducing the coated conductive film web into the second roller gap, wherein the coated conductive film web is laminated with the first dry electrode film and the second dry electrode film to obtain a double-sided dry electrode.

16. The method according to claim 10, wherein the coated conductive film web is introduced into the second roller gap immediately after coating, and the film web is introduced into the second roller gap after complete drying and / or curing, or at least before complete drying and / or curing.

17. The method according to claim 16, wherein the coating of the film web is performed in the same process as supplying the conductive film web to the second roller gap of the multi-roller calendar.

18. The method according to claim 16, wherein the coated conductive film web is introduced into the second roller gap and then cured, dried, and / or crosslinked in the multi-roller calender.

19. The method according to claim 18, wherein the film web is heated for curing, drying, or crosslinking, preferably the method wherein the coated film web is heated together with the first dry electrode film and / or the second dry electrode film via a heating roller of the multi-roller calender.

Images